Hits:

Indexed by:期刊论文

Date of Publication:2014-02-01

Journal:INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE

Included Journals:SCIE、Scopus

Volume:9

Issue:2

Page Number:569-579

ISSN No.:1452-3981

Key Words:Graphene; Gas diffusion cathode; Electro-Fenton; H2O2; Reactive Brilliant Blue

Abstract:A novel graphene doped gas diffusion electrode (GE/graphite-PTFE GDE) was prepared in this work with graphite powder and PTFE as starting materials. An undivided electro-Fenton system with this self-made GDE as cathode was fabricated to evaluate the activity of GE/graphite-PTFE GDE for H2O2 electro-generation. Compared with bare graphite-PTFE GDE, the electro-generated H2O2 concentration on GE/graphite-PTFE GDE was improved three times and can be reached to ca. 187 mg/L after 3 h electrolysis. The maximum production of H2O2 was obtained at pH 3.0, the current density of 2.0 mA/cm(2) and M-graphite: M-GE: M-PTFE = 8: 1: 2. The influences of operating parameters including solution pH and Fe2+ concentration were investigated on Reactive brilliant blue (KN-R) removal by the proposed electro-Fenton oxidation process. Under the optimal condition, nearly 80% of KN-R and 33.3% total organic carbon (TOC) could be removed after 180 min electrolysis, indicating that the GE/graphite/PTFE GDE was effective in H2O2 electro-generation and the proposed homogeneous electro-Fenton system was effective in KN-R oxidative degradation.